British royal Lord Frederick Windsor has become a first-time father after his actress wife Sophie Winkleman gave birth to a baby girl.

The Two and A Half Men star welcomed the tot in Los Angeles on Thursday (15Aug13).

A spokesperson for Lord Frederick's father Prince Michael of Kent says, "Lady Frederick Windsor was yesterday safely delivered of a baby girl at Ronald Reagan UCLA Medical Centre in Los Angeles (sic).

"The weight of the baby was 7lb. Lord Frederick Windsor was present at the birth. Prince and Princess Michael of Kent's family and Sophie's family have been informed and are delighted with the news. The baby's name will be confirmed in a few days."

The baby, whose grandfather is a cousin of British monarch Queen Elizabeth Ii, is 42nd in line to the throne.